View Full Version : PCIe Power connector for motherboard - Advice needed

03-11-2005, 12:29 PM
Hi, I am just in the process of putting together my new HTPC. I am using
Gigabyte 81945 Mobo
Gigabyte 6600GT 256Mb video card
Silverstone ST60F PSU - comes with PCIe 6 pin connectors

The Mobo has a 4 pin power connector for extra power to the PCIe slots.
The PSU has the normal 6 pin PCIe connnectors.
Do I need to buy a adaptor for conect both or can I use a normal 4 pin (12V) to connect to the mobo for extra power to the video card?

Is it necessary to connect the extra power at all to the mobo for the video card?

Any advice would be appreciated. Thanks in advance.

03-11-2005, 01:54 PM
Where is this connector? It's more usual for 4 pin connectors to be +12v for the CPU and your PSU should have a cable and plug for this.

03-11-2005, 01:55 PM
Well for what it's worth. I have a Radeon with the xtra power needed. Radeon suggest (and supply) a two way adapter to plug into the hard disk and a cable from there to the vid card.

03-11-2005, 01:58 PM
There is (sometimes) a 6pin connector that plugs into the graphics card. If the graphics card requires it and there isn't one on the PSU you can get an adpater cable.

Then there is the 4 pin cable that goes into the MB.

They are 2 different things.

03-11-2005, 02:03 PM
The power connector on the mainboard is only for extra power if you are using 2 PCIe graphics cards in SLI mode.
I have seen some mainboards that have this power connector on them even though they are not an SLI board.

03-11-2005, 03:28 PM
Thanks. I think CyaBro answers my question. Yes my motherboard has two PCIe slots and the extra power is for that but its a 4 pin. My PSU has a 6 pin PCIe connectors which (I think) are meant to be connected directly to certain Graphics card. If that's the case I won't need to connect the EXTRA power to the motherboard until I install 2 PCIe cards. Is that right?

03-11-2005, 03:41 PM
Yes, that's right.

03-11-2005, 04:01 PM
Many Many thanks...:)